Plant flourescence

In a previous article, siwek at acs.bu.edu (D. Siwek) says:
>I am seeking any information on flourescent emmisions by plants.
>Does it happen?
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I have seen it produced by inserting firefly genes into tobacco
plants, but I've never heard of it occurring naturally....
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The Spirit of Nature, a powerful force,
belongs and returns to its creative source.
- Excerpted from The Collective Works of Johnny Pokerface -